航海英語(yǔ)應(yīng)急部署單項(xiàng)選擇題每日一練(2019.01.18)

來(lái)源：考試資料網(wǎng)

1 Ventilation systems connected to a compartment in which a fire is burning are normally closed to prevent the rapid spread of the fire by（）.

2 The straight stream capability of an all-purpose nozzle is used in fighting a class A fire to（）.

3 What is an advantage of using foam in fire fighting?（）

4 What is NOT a characteristic of carbon dioxide fire-extinguishing agents?（）

5 There are two disadvantages to CO₂ pump as a firefighting agent. One of these is the limited quantity available，and the other is（）.